1.1 创建存储过程sql文件
1.1.1 创建表分区存储过程
[[email protected] ~]# vim /root/zabbix-partition.sql DELIMITER $$ CREATE PROCEDURE `partition_create`(SCHEMANAME varchar(64), TABLENAME varchar(64), PARTITIONNAME varchar(64), CLOCK int) BEGIN /* SCHEMANAME = The DB schema in which to make changes TABLENAME = The table with partitions to potentially delete PARTITIONNAME = The name of the partition to create */ /* Verify that the partition does not already exist */ DECLARE RETROWS INT; SELECT COUNT(1) INTO RETROWS FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_description >= CLOCK; IF RETROWS = 0 THEN /* 1.Print a message indicating that a partition was created. 2.Create the SQL to create the partition. 3.Execute the SQL from #2. */ SELECT CONCAT( "partition_create(", SCHEMANAME, ",", TABLENAME, ",", PARTITIONNAME, ",", CLOCK, ")" ) AS msg; SET @sql = CONCAT( 'ALTER TABLE ', SCHEMANAME, '.', TABLENAME, ' ADD PARTITION (PARTITION ', PARTITIONNAME, ' VALUES LESS THAN (', CLOCK, '));' ); PREPARE STMT FROM @sql; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF; END$$ DELIMITER ; DELIMITER $$ CREATE PROCEDURE `partition_drop`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), DELETE_BELOW_PARTITION_DATE BIGINT) BEGIN /* SCHEMANAME = The DB schema in which to make changes TABLENAME = The table with partitions to potentially delete DELETE_BELOW_PARTITION_DATE = Delete any partitions with names that are dates older than this one (yyyy-mm-dd) */ DECLARE done INT DEFAULT FALSE; DECLARE drop_part_name VARCHAR(16); /* Get a list of all the partitions that are older than the date in DELETE_BELOW_PARTITION_DATE. All partitions are prefixed with a "p", so use SUBSTRING TO get rid of that character. */ DECLARE myCursor CURSOR FOR SELECT partition_name FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND CAST(SUBSTRING(partition_name FROM 2) AS UNSIGNED) < DELETE_BELOW_PARTITION_DATE; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; /* Create the basics for when we need to drop the partition. Also, create @drop_partitions to hold a comma-delimited list of all partitions that should be deleted. */ SET @alter_header = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " DROP PARTITION "); SET @drop_partitions = ""; /* Start looping through all the partitions that are too old. */ OPEN myCursor; read_loop: LOOP FETCH myCursor INTO drop_part_name; IF done THEN LEAVE read_loop; END IF; SET @drop_partitions = IF(@drop_partitions = "", drop_part_name, CONCAT(@drop_partitions, ",", drop_part_name)); END LOOP; IF @drop_partitions != "" THEN /* 1.Build the SQL to drop all the necessary partitions. 2.Run the SQL to drop the partitions. 3.Print out the table partitions that were deleted. */ SET @full_sql = CONCAT(@alter_header, @drop_partitions, ";"); PREPARE STMT FROM @full_sql; EXECUTE STMT; DEALLOCATE PREPARE STMT; SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, @drop_partitions AS `partitions_deleted`; ELSE /* No partitions are being deleted, so print out "N/A" (Not applicable) to indicate that no changes were made. */ SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, "N/A" AS `partitions_deleted`; END IF; END$$ DELIMITER ; DELIMITER $$ CREATE PROCEDURE `partition_maintenance`(SCHEMA_NAME VARCHAR(32), TABLE_NAME VARCHAR(32), KEEP_DATA_DAYS INT, HOURLY_INTERVAL INT, CREATE_NEXT_INTERVALS INT) BEGIN DECLARE OLDER_THAN_PARTITION_DATE VARCHAR(16); DECLARE PARTITION_NAME VARCHAR(16); DECLARE OLD_PARTITION_NAME VARCHAR(16); DECLARE LESS_THAN_TIMESTAMP INT; DECLARE CUR_TIME INT; CALL partition_verify(SCHEMA_NAME, TABLE_NAME, HOURLY_INTERVAL); SET CUR_TIME = UNIX_TIMESTAMP(DATE_FORMAT(NOW(), '%Y-%m-%d 00:00:00')); SET @__interval = 1; create_loop: LOOP IF @__interval > CREATE_NEXT_INTERVALS THEN LEAVE create_loop; END IF; SET LESS_THAN_TIMESTAMP = CUR_TIME + (HOURLY_INTERVAL * @__interval * 3600); SET PARTITION_NAME = FROM_UNIXTIME(CUR_TIME + HOURLY_INTERVAL * (@__interval - 1) * 3600, 'p%Y%m%d%H00'); IF(PARTITION_NAME != OLD_PARTITION_NAME) THEN CALL partition_create(SCHEMA_NAME, TABLE_NAME, PARTITION_NAME, LESS_THAN_TIMESTAMP); END IF; SET @[email protected]__interval+1; SET OLD_PARTITION_NAME = PARTITION_NAME; END LOOP; SET OLDER_THAN_PARTITION_DATE=DATE_FORMAT(DATE_SUB(NOW(), INTERVAL KEEP_DATA_DAYS DAY), '%Y%m%d0000'); CALL partition_drop(SCHEMA_NAME, TABLE_NAME, OLDER_THAN_PARTITION_DATE); END$$ DELIMITER ; DELIMITER $$ CREATE PROCEDURE `partition_verify`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), HOURLYINTERVAL INT(11)) BEGIN DECLARE PARTITION_NAME VARCHAR(16); DECLARE RETROWS INT(11); DECLARE FUTURE_TIMESTAMP TIMESTAMP; /* * Check if any partitions exist for the given SCHEMANAME.TABLENAME. */ SELECT COUNT(1) INTO RETROWS FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_name IS NULL; /* * If partitions do not exist, go ahead and partition the table */ IF RETROWS = 1 THEN /* * Take the current date at 00:00:00 and add HOURLYINTERVAL to it. This is the timestamp below which we will store values. * We begin partitioning based on the beginning of a day. This is because we don't want to generate a random partition * that won't necessarily fall in line with the desired partition naming (ie: if the hour interval is 24 hours, we could * end up creating a partition now named "p201403270600" when all other partitions will be like "p201403280000"). */ SET FUTURE_TIMESTAMP = TIMESTAMPADD(HOUR, HOURLYINTERVAL, CONCAT(CURDATE(), " ", '00:00:00')); SET PARTITION_NAME = DATE_FORMAT(CURDATE(), 'p%Y%m%d%H00'); -- Create the partitioning query SET @__PARTITION_SQL = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " PARTITION BY RANGE(`clock`)"); SET @__PARTITION_SQL = CONCAT(@__PARTITION_SQL, "(PARTITION ", PARTITION_NAME, " VALUES LESS THAN (", UNIX_TIMESTAMP(FUTURE_TIMESTAMP), "));"); -- Run the partitioning query PREPARE STMT FROM @__PARTITION_SQL; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF; END$$ DELIMITER ;
1.1.2 创建维护分区存储过程
[[email protected] ~]# vim /root/partition_maintenance_all.sql DELIMITER $$ CREATE PROCEDURE `partition_maintenance_all`(SCHEMA_NAME VARCHAR(32)) BEGIN CALL partition_maintenance(SCHEMA_NAME, 'history', 7, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_log', 7, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_str', 7, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_text', 7, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_uint', 7, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'trends', 365, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'trends_uint', 365, 24, 14); END$$ DELIMITER ;
【解析】：
存储过程调用参数说明：(库名,表名,保存多少天的数据,每隔多久生成一个分区,本次生成多少分区）
1.2 mysql准备工作
1.2.1 清空history表数据
[[email protected] ~]# mysql -uroot –p mysql> use zabbix; mysql> truncate table history; mysql> truncate table history_str; mysql> truncate table history_uint; mysql> optimize table history;
1.2.2 修改表结构
mysql> Alter table history_text drop primary key, add index (id), drop index history_text_2, add index history_text_2 (itemid, id); mysql> Alter table history_log drop primary key, add index (id), drop index history_log_2, add index history_log_2 (itemid, id);
1.3 创建存储过程并调用
mysql> source /root/zabbix-partition.sql;
mysql> source /root/partition_maintenance_all.sql;
mysql> CALL partition_maintenance_all('zabbix');
mysql> exit
1.4 Zabbix网页配置
1.5 使用脚本进行清理
1.5.1 编写数据库清理脚本
[[email protected] ~]# vim /server/scripts/db_create.sh #!/bin/bash myDate=`date -d $(date -d "-7 day" +%Y%m%d) +%s` #取7天之前的时间戳 /usr/local/mysql/bin/mysql -uzabbix -p'123456' -h 127.0.0.1 -e "use zabbix;" -e "CALL partition_maintenance_all('zabbix');" /usr/local/mysql/bin/mysql -uzabbix -p'123456' -h 127.0.0.1 -e "use zabbix;" -e "DELETE FROM events WHERE clock<${myDate};" -e "optimize table events;" [[email protected] ~]# vim /server/scripts/db_clean.sh /usr/local/mysql/bin/mysql -uzabbix -p'123456' -h 127.0.0.1 -e "use zabbix;" –e "optimize table history" –e "optimize table history_uint"-e "optimize table history_log" -e "optimize table history_str" -e "optimize table history_text"
1.5.2 加入定时任务
[[email protected] ~]# crontab –e # function:mysql table partitioning 30 03 * * 07 /bin/sh /server/scripts/db_create.sh > /dev/null 2>&1 # function:mysql table optimize 00 00 * 01 * /bin/sh /server/scripts/db_clean.sh > /dev/null 2>&1
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